<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <input type="text" id="demo">
</body>
<script>
  let data={
    name:"fsl"
  }
  let oldSix=""
  Object.defineProperty(data,'name',{
  get(){
    console.log("鬼师被调用了");
    return oldSix
  },
  set(val){
    console.log("修改了鬼师的属性");
    console.log(val);
    document.getElementById('demo').value=val
    oldSix=val

  }}
  )
  document.querySelector('input').addEventListener('input', (e)=>{
    data.name=e.target.value
  })
</script>
</html>